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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 242 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.43 + 18 =
  2. 2.53 + 21 =
  3. 3.29 + 37 =
  4. 4.76 + 87 =
  5. 5.72 + 18 =
  6. 6.21 + 66 =
  7. 7.27 + 41 =
  8. 8.76 + 31 =
  9. 9.51 + 41 =
  10. 10.59 + 43 =
  11. 11.30 + 88 =
  12. 12.31 + 47 =
  13. 13.61 + 21 =
  14. 14.65 + 43 =
  15. 15.76 + 37 =
  16. 16.73 + 39 =
  17. 17.34 + 13 =
  18. 18.80 + 74 =
  19. 19.74 + 22 =
  20. 20.88 + 83 =
  21. 21.52 + 47 =
  22. 22.81 + 41 =
  23. 23.83 + 45 =
  24. 24.34 + 53 =
  25. 25.58 + 66 =
  26. 26.39 + 87 =
  27. 27.38 + 32 =
  28. 28.74 + 41 =
  29. 29.51 + 21 =
  30. 30.37 + 54 =
  31. 31.73 + 44 =
  32. 32.49 + 84 =
  33. 33.46 + 37 =
  34. 34.83 + 78 =
  35. 35.79 + 12 =
  36. 36.32 + 51 =
  37. 37.31 + 75 =
  38. 38.58 + 29 =
  39. 39.77 + 15 =
  40. 40.59 + 35 =

Answer key

  1. 61
  2. 74
  3. 66
  4. 163
  5. 90
  6. 87
  7. 68
  8. 107
  9. 92
  10. 102
  11. 118
  12. 78
  13. 82
  14. 108
  15. 113
  16. 112
  17. 47
  18. 154
  19. 96
  20. 171
  21. 99
  22. 122
  23. 128
  24. 87
  25. 124
  26. 126
  27. 70
  28. 115
  29. 72
  30. 91
  31. 117
  32. 133
  33. 83
  34. 161
  35. 91
  36. 83
  37. 106
  38. 87
  39. 92
  40. 94

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